. 2007 Jan;85(1):35–41. doi: 10.2471/BLT.05.026153

Table 2. Age distribution of human immunodeficiency virus (HIV) prevalence (%) in An Giang province (total number in brackets).

Population group	Age group (years)				Total
Population group	15–19	20–24	25–29	≥ 30	Total
Street-based female sex workers	39.1 (95%  CI^a 27.3–50.9) (69)^b	35.4 (95%  CI 27.2–44.4) (127)	29.0 (95%  CI 18.0–40.0) (69)	3.7 (95%  CI 0.1–6.9) (135)	24.3 (95%  CI 20.1–28.8) (400)
Karaoke-based female sex workers	26.8 (95%  CI 16.2–37.3) (71)	15.2 (95%  CI 10.1–20.2) (198)	11.7 (95%  CI 3.3–20.0) (60)	11.8 (95%  CI 0.1–23.1) (34)	16.5 (95%  CI 12.9–20.8) (363)
Injecting drug users	17.1 (41) 95% CI (7.1–32.1)	18.6 (113) 95% CI (11.9–27.9)	15.7 (51) 95% CI (7.0–28.6)	7.8 (153) 95% CI (4.1–13.3)	13.4 (358) 95% CI (10.1–17.4)
Unmarried young men	0.0 (251)	1.4 (95%  CI 0.3–3.9) (219)	No data	No data	0.6 (95%  CI 0.1–1.9) (470)
Mobile groups	2.9 (95%  CI 0.3–9.9) (70)	1.6 (95%  CI 0.2–5.5) (128)	4.9 (95%  CI 1.3–12.0) (82)	1.0 (95%  CI 0.1–3.6) (200)	2.1 (95%  CI 1.0–3.8) (480)

^a CI = confidence interval.